Semantics of DuplexNoTumble and DuplexTumble

[Michael Sweet]

H. Blischke wrote:
> The PostScript Language Reference Manual's sections on the setpagedevice operator states that
> <</Duplex true /Tumble false>>setpagedevice
> means turning the media around a parallel to the Y axis (aka "left binding"), and
> <</Duplex true /Tumble true>>setpagedevice
> means turning the media around a parallel to the X axix (aka "top binding").
> 
> There is no reference to the physical dimensions of the media, thus, if the width of the media is greater than its height (a physical landscape page), setting /Tumble to true actually means turning the media around the long edge.
> 
> On the other hand, there are printers (e.g. some HP printers and some from KonicaMinolta, to my experience), which tie the interpretation of /Tumble to the physical media dimensions or even to which edge is the leading edge with respect to paper feeding.
> 
> Thus, it seems the interpretation of th IPP attribute "sides=..." depends on the implementation of /Tumble in the printer's PS interpreter.
> 
> Any comments to this weird situation?

CUPS has to rely on vendors to do things in a sane way.  If they
don't do it right in their PS interpreter, then they have to adapt
their PPD file accordingly to get the correct behavior.

In my experience, I have never seen a problem with the current
sides -> Duplex mappings we use.

-- 
______________________________________________________________________
Michael Sweet, Easy Software Products           mike at easysw dot com